JP2512834B2 - Raw tire forming apparatus and raw tire forming method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a raw tire forming apparatus and a raw tire forming method. More specifically, the belt forming former is provided between the green tire forming farm and the belt forming former, and moves between the two to form an outer peripheral position of the green carcass toroidally shaped by the green tire forming former. To a raw tire forming apparatus using transfer for transferring to a fixed belt / tread assembly for assembling and a raw tire forming method using the same.

BACKGROUND ART In the prior art, for example, as shown in FIG. 12, one belt forming former (101) forms a belt / tread assembly and the other green tire forming former (102) forms a green carcass. Then, the bead setting mechanism (103A), (103B) supports the bead, and this is driven by the air cylinders (104A), (104B) to supply the bead to a predetermined position of the tire forming former (102). The bead lock mechanism built in the first and second shoulder formers (106A), (106B) is expanded in diameter to fix the beads with the green carcass, and the belt / tread assembly formed by the belt forming former (101). Is supplied to the outer peripheral position of the green carcass by a transfer mechanism (105), and then the shoulder formers (106A) and (106B) are moved inwardly by a driving means (not shown), By supplying the urging air, shaping the green carcass into a toroidal shape, assembling the belt and tread assembly, and further expanding the ply folding bladder provided on the first and second shoulder formers (106A) and (106B). Both edges of the carcass ply are folded back around the bead, and a pressing bladder provided outside the corner folding bladder (see, for example, JP-A-
59-70548), the ply turn-back bladder is further pressed from both outsides to firmly fix the turn-up part and the side wall part of the carcass ply to the carcass body part to complete the green tire.

Conventional equipment used for green tire building of this kind is generally of a rather complicated construction as described above, for example, bead setting for setting a bead at a predetermined position of a green carcass on a green tire building former. The mechanism (the bead setters (103A), (103B)) and the pressing mechanism (pressing bladder) for pressing the folded pladder of the carcass ply from the side surface are independently and separately provided.

Further, in the conventional tire forming apparatus, the transport mechanism holds and releases the belt / tread assembly by forming a large number of segments and inner segments corresponding to the outer surface of the belt / tread assembly. In order to expand / contract the inner diameter of the annular portion formed by the segments, that is, because the bladder or air cylinder that uses air pressure is used to expand / contract the segments, the belt / tread assembly is When holding and positioning it on the outer peripheral position of the green carcass, when assembling the green carcass by shaping in a toroidal shape, the expanding force of the green carcass due to the shaping internal pressure is generated and the belt / tread assembly is pressed outward, A bladder or air, whose pressing force is the driving part through the segment When acting on the cylinder, the segments are retracted air is compressed. For this reason, there is a problem that the outer diameter of the belt and the outer diameter of the tread are undesirably enlarged, resulting in a defective product. Also, the belt and tread assembly when assembled to the green carcass is not firmly adhered at its both side edges as shown by the dotted line (C) in FIG. There is also a problem that the edge portion must be pressed, and as a result, the breaker edge is deformed when pressed, and the cord meanders or separates, which adversely affects the uniformity of the tire.

In addition, a dedicated take-out mechanism is separately provided to take out the completed green tire from the tire forming former, or a segment of the transfer mechanism is used.
The dedicated mechanism has such drawbacks that the equipment is complicated and the segment use of the transfer mechanism requires time and effort to remove the green tire from the transfer mechanism.

The present invention has been made in view of the above problems of the prior art, and the structures of the bead setter and the folded bladder pressing mechanism are greatly simplified, and further, when the belt / tread assembly is assembled to the green carcass, the carcass Each segment of the belt transfer mechanism can maintain a fixed position against the expansion output of the belt, and the inconvenient expansion of the belt outer diameter and the tread outer diameter is prevented. An object of the present invention is to provide a raw tire forming apparatus and a raw tire forming method that are labor-saving and have good workability.

That is, according to the first aspect of the present invention, the structure is simplified by adding a function of pressing the ply turn-up pladder to the bead setting mechanism and moving the ply turn back pladder to the tire forming former side by using the transfer mechanism. It is an object of the present invention to provide an apparatus and a method for forming a raw tire with a particular focus.

Further, a second aspect of the present invention is to provide a raw tire molding apparatus, which is focused on improving the green tire take-out mechanism by integrally providing the transfer mechanism with the raw tire take-out mechanism. .

DISCLOSURE OF THE INVENTION A first aspect of the present invention relates to a belt forming mechanism (1), a transfer mechanism (2), a green tire forming mechanism (3), a first bead setting mechanism (4), and a second bead setting mechanism. (5) A raw tire forming apparatus comprising: (1) wherein the first and second shoulder former members (35A), (35B) of the raw tire forming mechanism (3) have a ply folded bladder (7). (2) The first bead setting mechanism (4) has a holding member arranged at the end of the drive shaft of the belt forming mechanism (1), and the holding member serves as a bead transfer / ply folding bladder pressing member. (3) The transfer mechanism (2) has an engagement member (23) with the bead transfer / ply turn-back bladder pressing member (42), and the transfer mechanism (2) is attached by the engagement member (23). The bead transfer and ply folding bladder The pressing member (42) is engaged and held to move to the bead setting position of the first shoulder former member (35A) of the green tire forming mechanism (3), whereby the bead transfer / ply turn-back bladder pressing member (42). ) End face is first
The ply turn-back bladder (7) disposed on the shoulder former member (35A) can be pressed when it swells, and (4) the bead transfer / ply turn-back bladder pressing member (53) of the second bead setting mechanism (5). ) Is moved to the bead set position of the second shoulder former member (35B) of the green tire forming mechanism (3) by the drive unit (54), whereby the end face of the bead transfer / ply turn-back bladder pressing member (53) is moved. The present invention relates to a raw tire forming apparatus, which is capable of pressing the ply folded bladder (7) arranged on the second shoulder former member (35B) when the ply folded bladder (7) is expanded.

In a second aspect of the present invention, the transfer mechanism (2) includes a green tire receiving bucket (91) and a green tire pressing roll (91) for holding a green tire from outside in a part of a segment that can move forward and backward toward the center. 94) and a green tire take-out mechanism (9) protruding from the green tire forming mechanism side.

In the green tire molding method of the present invention, a member having both functions of bead transfer and ply folding bladder pressing is connected to a transfer mechanism of a belt / tread assembly, and the member is transferred together with the transfer mechanism. Then, while the bead setting and ply turn-back on one side are completed, a member having both functions of bead transfer and ply turn-back plader pressing is moved by the drive unit to complete the bead setting and ply turn-on on the other side, and the bead setting step and It is characterized by including a step of separating the member from the transfer mechanism along the axial direction of the member each time the ply folding step is completed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing the outline of the configuration of one embodiment of the present invention, FIG. 2 is a sectional view of a belt forming part and a first bead setting mechanism, and FIG. 3 is a first bead setting mechanism. Front view of the holding member of FIG. 4, FIG. 4 is a front view of the transfer mechanism, and FIG.
FIG. 6 is an axial sectional view of the transfer mechanism, FIG. 6 is a schematic partial vertical sectional view of the ply turnback bladder, and FIG. 7 is an explanatory view showing a state in which the ply turnback bladder is pressed by the bead transfer / ply turnback bladder pressing member. , FIG. 8 is a sectional view of an essential part of a bead transfer / ply turnback bladder pressing member of the second bead setting mechanism, FIG. 9 is a schematic drive system diagram of a belt / tread assembly holding segment of the transfer mechanism, and FIG. 10 is a transfer. Explanatory view showing the molding action by the segment protrusion of the belt tread assembly holding segment of the mechanism, FIG. 11 is a schematic cross-sectional view of a green tire showing a portion where adhesion failure is likely to occur, FIG. It is a figure.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to such embodiments.

As shown in FIG. 1, a green tire forming apparatus according to one embodiment of the present invention includes a belt forming mechanism (1), a transfer mechanism (2) and a raw material forming mechanism arranged on a single base (B). It is composed of a tire forming mechanism (3), a first bead setting mechanism (4) and a second bead setting mechanism (5).

The material supply device for the belt forming mechanism (1) and the green tire forming mechanism (3) is the same as that of the conventional one, and the description thereof is omitted.

The belt forming mechanism (1) comprises a belt former section (11) and a belt former driving section (12), and a drive shaft (13) of the belt former driving section (12) penetrates the belt former section (11). It has a free end. The belt former portion (11) is for molding the belt / tread assembly (6) on its outer periphery (see FIG. 2) and is the same as the conventional one, and therefore detailed description thereof will be omitted. Drive unit (12)
Includes a drive shaft (13), a drive shaft rotating motor (14), and a support member (15).

Transfer mechanism (hereinafter also referred to as transferring)
(2) is a ring-shaped frame member (21), a drive section (22) for moving the frame member (21), and an engagement holding member (22) for engaging and holding the bead transfer / ply folding bladder pressing member (42). 23) and a belt / tread assembly holding member (24) (see FIGS. 4 to 5). This frame member (21) is driven by the drive unit (22) along the longitudinal direction of the base (B),
It is possible to reciprocate between the belt forming mechanism (1) and the green tire forming mechanism (3). The drive unit (22) may be any drive unit conventionally used in this type of moving mechanism. As an example, a motor (22a),
Drive screw member (22b) and female screw body (2
2c), a slide rail (22d), and a slide member (22e) slidably fitted on the slide rail (22e).

The belt / tread assembly holding member (24) will be described later.

The green tire forming mechanism (3) includes a forming former section (31) and a drive section (32) thereof. The molding former part (31) is cantilevered on the main shaft (33) extended from the drive part (32), and the telescopic molding members (34A), (34B).
And the first and second shoulder former members (35A), (3
5B). Telescope type molding member (34A),
(34B) is the first and second shoulder former members (35A),
(35B) is a solid cylindrical body supported respectively,
The diameters are slightly different from each other. Therefore, when forming the shoulder portion, the first and second shoulder former members (35A) and (35B) are axially inwardly aligned with each other, so that one side is telescopically fitted into the other side when the so-called bead width is adjusted. The former width has been shortened. In the figure (36) is the spindle (3
Rotating support member that cantilever-supports 3) to drive rotation, (37)
Is a motor for inward movement of the first and second shoulder former members (35A), (35B). (38) is a drive motor for the spindle (33). This molding former part (31) has a ply folded bladder (7) as shown in FIGS. 6 to 7 on the outer peripheral surfaces of the first and second shoulder former members (35A), (35B), and Known structures that can be expanded / contracted (for example, Japanese Patent Publication Sho 59
No. 38097), a bead lock mechanism (not shown) is provided.

A first bead setting mechanism (4) is arranged at the free end of the drive shaft (13). The first bead setting mechanism (4) is detachable from the holding member (41) fitted to the free end of the drive shaft (13) and the holding member (41), as shown in FIGS. And a bead transfer / ply turn-back bladder pressing member (42) fitted to the. The holding member (41) of the first bead setting mechanism (4) is connected to the disc-shaped member (41a) fitted to the tip of the drive shaft (13) and the outer edge of the disc-shaped member (41a). And a short cylindrical body (41b). The short cylindrical body (41b) is in contact with the inner circumference of the bead (43) at six places, and the drive shaft (13)
The bead support member (44) is vertically provided toward the green tire forming mechanism (3) so that the bead (43) is located on the extension line of the axis line. The bead transfer / ply turn-back bladder pressing member (42) is formed in a ring shape as shown in FIG. 2 so that it can be attached to and removed from the outer periphery of the short cylindrical body (41b) in the direction of the raw tire forming mechanism (3). Is fitted to. The fitting part is, as shown in FIGS. 2 to 3, a short cylindrical body (41b).
The ball plunger (41c) is arranged on the side to project to the outer peripheral surface, and the bead transfer / ply folding bladder pressing member (4
A concave groove (42a) is provided on the inner peripheral surface corresponding to 2) and is engaged so as not to accidentally fall off. In this engaged state, the end surface (42b) of the bead transfer / ply turn-back bladder pressing member (42) facing the raw tire molding portion is formed flat, and the bead support member (44) has a substantially bead width dimension. It is arranged at a position projecting to some extent. This end face (42
b) functions as a ply folded bladder pressing surface.
A bead holding portion (42c) is formed by embedding a permanent magnet to hold the bead (43) at a position of the end surface (42b) with which the bead (43) abuts. The bead holder (42c) is provided on the bead support member (44) with a bead (4).
When 3) is supported, it is adsorbed and held. The bead holding portion (42c) is removable. Further, a concave groove (42d) is provided as an engaged portion for the engagement holding member (23) on the outer periphery of the bead transfer / ply folded bladder pressing member (42).

As shown in FIGS. 1 and 4 to 5, the engagement holding member (23) is composed of an air cylinder (23a) and an engagement member (23b) driven by the air cylinder (23a). It is arranged at three points on the surface of the frame member (21) facing the belt former (11). The engagement member (23b) projects toward the center by driving the air cylinder (23a), enters the groove (42d), and retains the engagement.

The second bead setting mechanism (5) includes a bead holding member (51), a supporting member (52) for supporting the bead holding member (51), a bead transfer / ply return bladder pressing member (53), and a bead transfer / ply return bladder pressing member. It is composed of a drive unit (54). The support member (52) is, as shown in FIGS. 1 and 8, coaxial with the main shaft (33), the rotation support portion (3).
Is fixed to the casing member. This support member (5
The bead holding member (51) is provided on the surface of the molding former side of 2).
Is installed. A bead transfer / ply turn-back bladder pressing member (53) is disposed outside the bead holding member (51) and the support member (52). The bead transfer / ply turn-back bladder pressing member (53) can reciprocate between the former section (31) and the drive section (32) by driving the bead transfer / ply turn-back bladder pressing member drive section (54). The bead transfer / ply turn-back bladder pressing member drive unit (54) may be any unit conventionally used in this type of moving mechanism. As one example thereof, a motor (54a), a drive screw member (54b), a female screw body (54c) screwed with this, a slide rail (54
d) and a slide member (54
e) and the like. The surface (53a) of the bead transfer / ply turn-back bladder pressing member (53) that comes into contact with the bead is the same as the end surface (42b) of the bead transfer / ply turn-back bladder pressing member (42) of the first bead setting mechanism (4). It is similarly configured. That is, the bead holding member (53b) is arranged at the portion where the bead (55) contacts. Therefore, the bead transfer / ply turn-back bladder pressing member (53) can move while holding the bead (55), and can press the ply turn-back bladder.

In the transfer mechanism (2), as shown in FIGS. 4 to 5, the belt / tread assembly holding member (24) for holding the belt / tread assembly (6) in contact with the outer periphery thereof has a ring-shaped frame member (24). A large number are arranged in the circumferential direction so as to form an annular shape in 21). The holding member (24) includes a segment (24a) and a hydraulic cylinder (24b) that drives the segment (24a) to move back and forth toward the center. Holding member (2
Each hydraulic cylinder (24b) which drives each segment (24a) of 4) toward the center is connected to the hydraulic drive system (8) as shown in FIGS.

The hydraulic drive (8) is an air / hydro tank (8
1), an electromagnetic switching valve for air (82), an electromagnetic switching valve for oil (83), and piping connecting them to the hydraulic cylinder (24b). Air Hydro Tank (81)
Is filled with air (A) and oil (0). Air is supplied from an air supply source (not shown) to the pipe and is supplied to the air / hydro tank (81) through the electromagnetic switching valve for air (82). Air Hydro Tank (8
The oil (0) filled in 1) is connected to the hydraulic cylinder (24b) through the oil electromagnetic switching valve (83) by piping.
Is supplied to the oil chamber (84). Hydraulic cylinder (24
Air in the air chamber (85) of B) is discharged through the pipe via the electromagnetic switching valve for air (82). FIG. 9 shows a segment (24a) for holding a belt and tread assembly (6) molded on the belt former section (11).
Indicates that the diameter is decreasing. That is, air is supplied from the air supply source to the air / hydro tank (81) through the pipe (P1), whereby oil is sent from the air / hydro tank (81) to each cylinder (24b) and each cylinder (24b). ) Is exhausted through the pipe (P2), so the piston (24c) is pushed by the oil. Therefore, the segment (24a) moves forward toward the center and abuts and holds the belt / tread assembly (6). Then, the diameter of the belt former portion (11) is reduced, and the belt / tread assembly (6) can be removed from the belt former portion (11). In FIG. 9,
When the electromagnetic switching valve for air (82) is switched, the air supply side and the air exhaust side are switched, air is supplied from the pipe (P2), and air is exhausted from the pipe (P1), and the piston (24c ) Is pushed in the opposite direction and segment (24a)
Moves backward in the direction away from the center of the belt former section (11). For example, after the belt / tread assembly (6) is pressure-bonded to the toroidally shaped green carcass (63), it is moved backward. First
Fig. 10 shows that the transfer ring (2) waits by positioning the belt / tread assembly (6) at the regular position (center) on the molding former (31), and waiting for the green carcass on the molding former (31). (63) is shaped in a toroidal shape under the influence of the internal pressure (IP) and is pressed against the belt / tread assembly (6) at the standby position, and the expansion force (transferring (2) due to the shaping internal pressure (IP) is applied.
Shows the state in which the piston (24c) of the hydraulic cylinder (24b), and hence the segment (24a), is being retracted) at this time, that is, at the same time as the start of shaping, electromagnetic switching for oil is performed. The valve (83) is switched to the closed position and the oil chamber (8b) of the hydraulic cylinder (24b) is
The oil is sealed in 4), and unlike the air, it is a non-compressible fluid, so even if the shaping proceeds, the oil pressure in the hydraulic cylinder (24b) only rises, and it depends on the shaping internal pressure. The piston (24c) and the segment (24a) do not retract due to the expanding force. This allows the belt (62) and tread (61)
First, belt outer diameter (BD) and tread outer diameter (TD)
Is maintained in a normal size, and secondly, as shown in FIG. 10, the flat state held by the segment (24a) is pressure-bonded to the shaped green carcass (63). Cause Therefore,
Disadvantage in the method of moving the segment (24a) forward and backward by the conventional air cylinder, that is, the piston (24c) and the segment (24a) due to the progress of shaping.
Retreat, causing the belt outer diameter and the tread outer diameter to be undesirably enlarged, resulting in a defective product. Further, when shaping is completed, the belt / tread assembly (6) is shown by being surrounded by a dotted line (C) in FIG. As described above, since both edges are attached to the green carcass, the both edge portions must be forcibly pressed against the carcass by using a stitcher in the subsequent stitching step, and as a result,
All breakage of the breaker edge, snaking and separation of the cords, which has a great adverse effect on the homogeneity of the tire, will be eliminated.

The hydraulic cylinder (24b) is designed to withstand a maximum hydraulic pressure of 210 kg / cm ² . This hydraulic cylinder (24b) can drive the segment (24a) The transferer is a type that can increase not only the so-called telescopic molding former but also the shoulder former such as rubber former (that is, bead width adjustment). It can also be applied to a molding device that performs shaping using the former.

Further, in this embodiment, as shown in FIG. 5, the transfer mechanism (2) has a green tire take-out mechanism (9). The green tire take-out mechanism (9) includes a green tire receiving bucket (91) and a bucket support member (92).
The tire holding roll shaft (93) and the tire holding roll (94). Green tire receiving bucket (9
1) has a circular arc shape to hold the green tire on its upper surface. The bucket support member (92) is fixed to the two lower segments (24a) of the transfer mechanism (2) and protrudes toward the molding former (31) side by the width of the green tire. The tire pressing roll shaft (93) is fixed to the upper two segments (24a) of the transfer mechanism (2),
Like the bucket support member (92), the green tire width protrudes toward the molding former (31) side. The tire pressing roll (94) is rotatably held by the tire pressing roll shaft (93). The tire pressing roll shaft (93) is preferably arranged at a position facing the bucket support member (92). The green tire take-out mechanism (9) holds and takes out the green tire completed by the green tire forming mechanism (3), and the taken-out green tire is handed over to a nearby transfer vehicle by an operator.

Next, a raw tire forming method using this raw tire forming apparatus will be described.

(1) As shown in FIG. 2, a bead transfer / ply turn-back bladder pressing member (42) of the first bead setting mechanism.
Is held by the holding member (41) and is in a standby state. In this state, the bead (43) is set on the bead support member (44). On the other hand, as shown in FIG. 8, the bead transfer / ply folding bladder pressing member (53) of the second bead setting mechanism is also in the standby state. In this state, the bead (55) is set on the bead holding member (51).

(2) At this time, the transfer mechanism (2) is located on the green tire width (LA) side from the former center position (L0) of the forming former section (31) shown in FIG. 1, and the completed green tire is the green tire. It is held by the take-out mechanism (9).

(3) The transfer mechanism (2) returns to the standby position (L1) in this state.

(4) When the transfer mechanism (2) returns to the standby position (L1), the segment (24a) moves backward. Therefore, the tire pressing roller (94) of the green tire take-out mechanism (9) held via the segment (24a) rises and the bucket (91) descends to release the restraint of the green tire.

(5) An operator loads the green tires from the bucket (91) onto the transfer vehicle.

(6) The transfer mechanism (2) moves from the standby position (L1) to the delivery position (L2).

(7) The engagement holding member (23) of the transfer mechanism (2) is driven, the engagement member (23b) projects toward the center and engages with the concave groove (42d), and the bead transfer / ply folding bladder pressing member ( 42) hold.

(8) The transfer mechanism (2) returns to the standby position (L1). At this time, the bead (43) is adsorbed to the bead holder (42c).

(9) During this period, the first and second shoulder former members (35
On the molding former part (31) in which A) and (35B) are fully opened, the tire constituent materials are sequentially applied to form a cylindrical green carcass.

(10) When the molding of the green carcass is completed, the bead transfer / ply turn-back bladder pressing member (53) of the transfer mechanism (2) and the second bead setting mechanism (5) moves toward the forming former section (31). . At this time, the bead (55) is adsorbed to the bead holding member (53b) of the bead transfer / ply turn-back bladder pressing member (53).

(11) Bead transfer and ply folding bladder pressing member (4
When 2) and (53) reach the bead set positions (LA) and (LB) on the molding former (31), respectively, the transfer mechanism (2) and the bead transfer / ply turn-back bladder pressing member (53) move. Stop.

(12) First and second shoulder former members (35A), (35
The bead lock mechanism of B) is expanded in diameter, the carcass is lifted, the beads (43) and (55) are fixed in contact with the carcass, and at the same time, the transfer mechanism (2) is at the standby position (L1). Further, the bead transfer / ply turn-back bladder pressing member (53) returns to the standby position.

(13) The transfer mechanism (2) moves to the delivery position (L2).

(14) The engagement holding member (23) of the transfer mechanism (2) is driven, and the engagement member (23) retracts. As a result, the bead transfer / ply folding bladder pressing member (42) is released and held by the holding member (41).

(15) The transfer mechanism (2) moves to the former center (L3) of the belt former section (11).

(16) The belt / tread assembly holding member (24) of the transfer mechanism (2) is driven, and the segment (24a) moves toward the center. As a result, the diameter of the belt / tread assembly holding member (24) is reduced, and the segment (24a) holds the belt / tread assembly (6).

(17) The transfer mechanism (2) returns to the standby position (L1).

(18) The transfer mechanism (2) moves to the former center position (L0) of the forming former section (31), and sets the belt / tread assembly (6) on the green carcass on the forming former section (31).

(19) First and second shoulder former members (35A), (35
B) is driven by the motor (37), and from the fully opened state, the beads move to each other in the direction of the former center along the axial center, and the width of the bead is adjusted.

(20) At the same time, the internal pressure (IP) is supplied into the carcass, and the shaping for forming the toroidal shape is started.

(21) The first and second shoulder former members are closed, shaping proceeds until the stop setting position is reached, and the top of the toroidal carcass is crimped to the waiting belt / tread assembly (6). .

(22) The tread shoulders are crimped with a stitcher.

(23) The transfer mechanism (2) returns to the standby position (L1).

(24) The transfer mechanism (2) moves to the delivery position (L2), and returns the bead transfer / ply turn-back bladder pressing member (42) (without beads) to the reception standby position (L1).

(25) First and second shoulder former members (35A), (35
B) Turnback bladder (7), (7) expands and turns back the sidewall and ply edge around the bead.

(26) After a certain period of time, the bead transfer / ply turn-back bladder pressing member (42) and the bead transfer / ply turn-back bladder pressing member (53) held by the transfer mechanism (2) face the molding former (31). And move each other to move the inflating folding bladders (7) and (7) to the end face (42
In steps a) and (53a), the folding is completed by pressing to a predetermined pressing limit.

(27) The transfer mechanism (2) returns to the standby position (L1), and the bead transfer / ply folding bladder pressing member (53) also returns to the standby position.

In another embodiment, the green carcass is not molded by the green tire molding former, but the one molded by another band molding machine is adhered to this molding former section (31), and the bead set is performed by the device of the present invention. It is also possible to perform shaping and folding.

INDUSTRIAL APPLICABILITY According to the present invention, since the return bladder is pressed by the beat setting mechanism, the conventional bladder pressing mechanism can be omitted, and one bead transfer mechanism is omitted because one bead transfer is performed by the transfer mechanism. Therefore, the apparatus can be simplified, the bead setting accuracy can be easily maintained, the accuracy of the molding apparatus can be easily maintained, and the total length of the molding apparatus can be shortened. Furthermore, since the green tire take-out mechanism is provided in the transfer mechanism, the separately provided green tire take-out mechanism can be omitted, the apparatus can be simplified, and the take-out efficiency can be improved.

According to the molding method of the present invention, the belt / tread assembly transfer mechanism transfers the bead transfer / ply folding bladder pressing member holding the bead of the bead setting mechanism from the standby position to the bead set position of the green tire forming mechanism. The bead transfer / ply turn-back bladder pressing member that holds the bead of the second bead setting mechanism at the same time the lock is completed is moved from the standby position to the bead set position of the green tire forming mechanism by the drive unit to complete the bead lock. After the cylindrical carcass on the green tire forming mechanism is shaped into a toroidal shape, when the carcass both sides are folded back around the bead by the bulging of the bladder, the transfer mechanism causes the bead transfer / ply return bladder pressing member to A folded back bulge that was transferred from the standby position to the green tire forming mechanism side and swelled The bur is pressed from the side, and at the same time, the bead transfer / ply turn-back bladder pressing member is moved to the raw tire molding mechanism side by the drive unit and presses the swollen turn-up bladder from the side, and the carcass side edge is turned back, respectively. Can be completed.

According to the first aspect of the present invention, in the conventional green tire molding apparatus, the function of pressing the ply turn-back bladder is added to the bead setting mechanism, so that the conventional bladder pressing mechanism can be omitted and the apparatus can be simplified. You can

According to the second aspect of the present invention, since the segment of the belt / tread assembly holding member is driven by the hydraulic cylinder, the segment moves due to the internal pressure generated in the green carcass during shaping, and the belt outer diameter becomes inconvenient. There is no need to expand the tires to make them defective.

According to the third aspect of the present invention, since the transfer mechanism is provided with the green tire take-out mechanism, the separately provided green tire take-out mechanism can be omitted, the device is simplified, and the take-out work efficiency is improved.

Claims (3)

(57) [Claims] 1. A green tire molding apparatus comprising a belt molding mechanism, a transfer mechanism, a green tire molding mechanism, a first bead setting mechanism, and a second bead setting mechanism, comprising: (1) the green tire molding. The first and second shoulder former members of the mechanism have ply turnback bladders, and (2) the first bead setting mechanism has a holding member arranged at the drive shaft end of the belt forming mechanism, A bead transfer / ply turn-back bladder pressing member is detachably held, and (3) the transfer mechanism has an engaging member with the bead transfer / ply turn-back bladder pressing member, and the bead is provided by the engaging member. The transfer / ply turn-back bladder pressing member is engaged and held to move to the bead set position of the first shoulder former member of the green tire forming mechanism, and thereby the front The end surface of the bead transfer / ply turn-back bladder pressing member can press the ply turn-back bladder disposed on the first shoulder former member when it swells, and (4) the bead transfer / ply turn-back bladder of the second bead setting mechanism. The pressing member moves to the bead setting position of the second shoulder former member of the green tire forming mechanism by the driving unit, whereby the end face of the bead transfer / ply turn-back bladder pressing member is disposed on the second shoulder former member. In addition, the raw tire forming apparatus is characterized in that the ply folded bladder can be pressed when the ply is folded. 2. A green tire forming apparatus including a belt forming mechanism, a transfer mechanism, and a green tire forming mechanism, wherein a green tire is attached to a part of a segment of which the transfer mechanism can move toward and away from the center. A green tire forming device having a green tire take-out mechanism in which a green tire receiving bucket and a green tire pressing roll that are held from one side are provided on the green tire forming mechanism side in a protruding manner. 3. A raw tire forming method comprising a belt forming step, a green carcass forming step, a bead setting step, a belt / tread assembly attaching step, and a toroidal shaping step of the green carcass. And a member having both functions of pressing the ply folded bladder and connecting it to the transfer mechanism of the belt / tread assembly,
The member is transferred integrally with the transfer mechanism to complete one bead setting and ply turn-back, and a member having both functions of bead transfer and ply turn-back bladder pressing is transferred by the drive unit and the other bead is transferred. A step of removing the member from the transfer mechanism along the axial direction of the member every time the bead setting step and the ply turning step are completed after the setting and the ply turning step are completed. Tire molding method.